Seattle Mariners C John Jaso played some first base in an intrasquad game Sunday, Feb. 26, and he made an instant impression. Jaso feels comfortable at the position despite not having much experience there. 2B Carlos Guillen will likely be a backup to 1B Justin Smoak, but Guillen's health is in question.

The Seattle Mariners signed free-agent 2B Carlos Guillen (Tigers) to a minor league deal with an invitation to spring training Wednesday, Feb. 1. He is likely to compete for playing time at third base and in the outfield.